
Keywords: CP, cysteine protease; PVS, phenyl vinyl sulfone; PPS, 1-penten-1-yl phenyl sulfone; MSS, mesityl styryl sulfone; CTS, 1-cyclohexenyl p-tolyl sulfone; CH3CN, acetonitrile; H2O, water; HCOOH, formic acid; ESI, electrospray ionization; NSI, nanoelectrospray